Bloomberg Opinion columnist David Fickling tells us you can think of tungsten mining as “a century old prediction market for war.” As he writes in a recent piece, tungsten is “a super-element that can determine the fate of nations.” While the commercial market for tungsten is fairly small, it can be crucial in war manufacturing, due to its high density and melting point. He learned more about tungsten mining, and its increasing geopolitical necessity, during a visit to Australia's Dolphin Mine, which has a history of opening up during times of war, and then closing again during times of peace. He explains to us why investors are once again interested in tungsten mining and why it's been so hard (over the last century) to sustain production outside of China.